Every business decision includes reliable opportunities and risk assessment. Overestimation or underestimation of either may result in a business failure. This is even more significant in the turbulent business environment where it is necessary to continuously question your own position. Disregarding these circumstances may lead into business adventure and probably loss.
Having Hamlet attitude and being afraid of mistakes means stagnation and, in the end, failure. However, you may get the same result if you recklessly and blindly follow your dream idea.